To book, call 8872524007.
What the Magnesium test checks
Only about 1% of your body's magnesium is in the blood. The rest is inside bones and cells. So the serum level is a rough guide: a normal value doesn't completely rule out a shortage in the tissues, but a low value does tell the doctor something is off.
Magnesium is closely tied to two other minerals. When it's low, the kidneys waste potassium and the parathyroid glands release less hormone, so calcium falls too. Topping up those two won't hold until magnesium is corrected.
Why your doctor may order it
- Muscle cramps, twitching, tremor or weakness
- Palpitations or an irregular heartbeat
- Low potassium or low calcium that isn't responding to treatment
- Long-term acid-reducing tablets (PPIs such as omeprazole or pantoprazole), which can lower magnesium over months or years
- Water tablets, long-standing diarrhoea, heavy alcohol use or poorly controlled diabetes
- Kidney disease, where magnesium can build up instead
- Pregnancy care when magnesium sulphate is being given
How to prepare
No fasting is needed. Eat normally and keep taking your medicines, but tell us about acid tablets, water tablets, laxatives, antacids and any magnesium supplement. Magnesium-containing antacids and laxatives can raise the level, especially when the kidneys are weak.
Sample type and report time
A serum sample is drawn into a red or yellow tube. Red blood cells hold more magnesium than serum, so a haemolysed sample can give a falsely high result. Reports are usually ready the same day or next day.
If you're searching for a magnesium test near me for someone with leg cramps who can't easily travel, we collect at home in Banur and nearby villages; see home sample collection.
Understanding your results
Typical adult serum magnesium is roughly 1.7 to 2.2 mg/dL (about 0.7 to 1.0 mmol/L), though labs differ.
Low magnesium can be associated with long-term PPI use, diuretics, diarrhoea, alcohol, uncontrolled diabetes and poor diet. High magnesium is uncommon and is usually linked to reduced kidney function combined with magnesium-containing medicines, or to magnesium given in hospital. Doctors check serum creatinine to see how well the kidneys clear it.
The range printed on your report is the one that applies, ranges vary by lab and method, and your doctor reads the result alongside your symptoms and other tests.
FAQ
Can acidity tablets lower magnesium?
Yes. Long-term use of PPIs such as omeprazole or pantoprazole is a known cause of low magnesium. Don't stop them without your doctor's advice.
Do I need to fast for a magnesium test?
No. You can eat and drink normally.
Can a normal result still mean I'm low in magnesium?
Possibly. Blood holds only a tiny share of the body's magnesium, so a normal serum value doesn't fully exclude a tissue shortage. Your doctor weighs this with your symptoms.
Why did my doctor order magnesium when my potassium was low?
Low magnesium makes the kidneys lose potassium, so potassium often won't correct until magnesium does.
Book at Alpha Laboratory
Call 8872524007 to book a magnesium test, or WhatsApp us. Lab hours are on the contact page.